The people you follow on twitter matter. Vice versa, the people that follow you matter as well. Having a quality following is important to building your social authority. It is much better to have a small and active following that is engaged and passed relevant information rather than a large following that shares garbage. To achieve such a quality following, you can do these steps:
Know who the scammers are
Scammers are accounts that try and follow as many people as possible, regardless of relevance, in order to build their own following. When someone decides to follow you, check their profile to see how many people they are following. If they are following more than ten thousand profiles but have a significantly less following, you know you have a scammer on your hands.
You don’t always have to follow back
You are not obligated to follow anyone back when they start following you.
Look at their following
When you look to see who you want to follow, look at who they are following as well. If the profiles have some type of consistency, i.e. they all have something to do with the banking industry or with computer manufacturing, then you know you have someone legitimate. But, if they all seem random, they probably are random.
Check their posts
Look to see if they are posting information you find interesting or that is worth sharing with your own following. Also check to see how often they post. Some profiles become inactive, or they do not post often enough to help benefit you. In some cases, they may post too much.
Keep your following small
This seems counter intuitive, as many people think the larger the audience is, the better. What really matters is if those followers are listening to what you have to say. It is better to have a small following that listens and interacts with you than having a large following that does not.
Simply put: quality over quantity for twitter followers.